Here are a few terms that you need to learn before you get too deep into this guide.

I know. Your probably wandering what's this got to do with raising worms? Well, I'll tell you. Nothing and everything. Depending on who you are.

This is the artificial rearing or cultivation of worms for a specific purpose. Many worms in various worm species are raised for bait, food, pets, school projects, waste management, and my personal favorite harnessing their excrement.

In worm farming terms, it's the product or process of using earthworms, mainly red wigglers (Eisenia Fetida), to consume waste and turn it into a rich soil amendment. Vermicompost contains not only the worms but the bedding materials, organic waste, microorganisms, and worm castings. 

Vermicastings (worm castings) is simply worm poop. It is the excreted substance that comes out of the back end of the worm. Many purposes of vermicastings are used in household plants, gardens, lawns, and commercial farming. It's primary purpose is to rejuvenate, or reclaim the spent state of ordinary and chemically fertilized soil to a rich, vibrant and reusable substance. Often times people use this synonymously with vermicompost but it has an entirely different meaning. This will become useful in the future should you ever have to make a distinction.

Worm Tea
 a nutrient rich liquid teaming with beneficial microbes for the use of feeding and maintaining healthy plants.
The "worm tea" comes from a process in which the castings are brewed in a highly oxygenated water supply in order to multiply the beneficial organisms which are essentially food for the plants.